var chart = c3.generate({
    data: {
        rows: [
            ['data1', 'data2', 'data3'],
            [90, 120, 300],
            [40, 160, 240],
            [50, 200, 290],
            [120, 160, 230],
            [80, 130, 300],
            [90, 220, 320],
        ]
    }
});
